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《Journal of Daqing Petroleum Institute》 2008-06
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The flow model of the triple-medium composite reservoirs and the type curves

CHEN Fang-fang1,2,JIA Yong-lu2,HUO Jin3,SHI Guo-xin3,ZHOU Guang-hua3(1.Tarim Oilfield Company of PetroChina,Kuerle,Xinjiang 841000,China;2.SChool of Petroleum Engineering,Southwest Petroleum University,Chengdu,Sichuan 610500,China;3.Luliang Operation Zone,Xinjiang Oilfield Company,PetroChina,Karamay,Xinjiang 834000,China)  
Considering skin effect and wellborn storage,a well test interpretation model of triple homogeneity medium radial composite reservoir is established.Through Laplace transformation,the Laplace space analytic solution has been obtained and converted into real space by means of the numerical inversion.In the end,the pressure and the pressure derivative bilogarithmic type curves have been drawn up.From the physical transfusion mechanism,the analysis of the curve shape characteristics and the flow regime division has been carried out.The effects of permeability ratio of inner to that of outer zones,radius of inner zone,inter-porosity flow factor,storativity ratio on pressure transient are discussed.The results indicates:when the value of the permeability of inner zone is smaller than that of outer zone,the pressure derivative curve will decline at long-time values,on the contrary,the pressure derivative curve will go upward at long-time values.The radius of inner zone determines the coming time of pressure transient reflecting the effect of outer permeability,inter-porosity factor determines the time of occurrence of the inter-porosity flow,storativity ratio decides the width and depth of the hollow on the derivative curve.
【Fund】: 中国石油天然气集团总公司重点工程攻关项目(971007110165)
【CateGory Index】: TE353
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